1 TYRE - FLEX COUPLING The flexible capabilities of the Tyreflex Coupling help to accommodate angular, parallel and axial misalignments. Parallel Misalignment up to 6 mm. Angular Misalignment up to 4 0 . End Float up to 8 mm. Suitable in ambient temp. up to 70 0 C. CUSHIONING SHOCK LOA DS Tyreflex being a torsionally soft coupling protects against vibration, impact loads and heavy shocks in the event of sudden load changes. EA SE OF A SSEMBL Y / DI SA SSEMBL Y Alignment is quickly checked by placing a straight edge across the outside diame ters of the flanges. Installation or replacement of new tyre is achieved without disturbing driver or driven shafts, simply by loosening the clamping screws, placing a new tyre between the flanges and clamping rings and then tightening the clamping screws. FEA TURES Tyre-flex type TFH consists of four parts namely Hub, Clamping ring, Flange & Tyre clamped with a set of screws and washers. These are reversible which permit arranging them in any position FF, HH, HF as shown. Low inventory is the important feature of this type. DIMENSIONAL DAT A J is the wrench clearance to allow for tightening and loosening the bush on the shaft. The use of a shortened wrench will allow this dimension to be reduced. For Torque & Power rating refer page 2. Weights & M.I.. are at without bores. For detail information about Taper Bush bore, please refer Taper Bush catalogue. TYPE TFH / T / TO / RST TYRE - FLEX COUPLINGS TYPE TFH Weight Moment kg of inertia (WR 2 ) kgm 2 Inch Metric TFH 7 1610 1 5/8 42 197 144 25 76 38 69 17 19 6.8 0.018 TFH 8 2012 2 50 210 167 32 96 42 85 17 21 9.1 0.036 TFH 9 2517 2 1/2 60 235 188 45 110 48 101 19 11 13.2 0.064 TFH 10 2517 2 1/2 60 254 216 45 125 48 102 19 12 18.7 0.110 TFH 11 3020 3 75 279 233 51 140 55 108 22 6 23.5 0.160 TFH 12 3020 3 75 314 264 51 152 55 111 25 9 34.1 0.280 H F M F G J E Max. Bore Size Bush No Ø A Ø C E Ø D J F G M
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TYRE - FLEX COUPLING
The flexible capabilities of the Tyreflex Coupling help to
accommodate angular, parallel and axial misalignments.
Parallel Misalignment up to 6 mm.
Angular Misalignment up to 40.
End Float up to 8 mm.
Suitable in ambient temp. up to 700C.
CUSHIONING SHOCK LOADS
Tyreflex being a torsionally soft coupling protects against vibration,
impact loads and heavy shocks in the event of sudden load changes.
EASE OF ASSEMBLY / DISASSEMBLY
Alignment is quickly checked by placing a straight edge across the
outside diameters of the flanges. Installation or replacement of new
tyre is achieved without disturbing driver or driven shafts, simply by
loosening the clamping screws, placing a new tyre between the
flanges and clamping rings and then tightening the clamping screws.
FEATURES
� Tyre-flex type TFH consists of four parts namely Hub, Clamping
ring, Flange & Tyre clamped with a set of screws and washers.
� These are reversible which permit arranging them in any
position FF, HH, HF as shown. Low inventory is the important
feature of this type.
DIMENSIONAL DATA
J is the wrench clearance to allow for tightening and loosening the bush on the shaft. The use of a shortened wrench will allow this dimension to be reduced. For Torque & Power rating refer page 2. Weights & M.I.. are at without bores. � For detail information about Taper Bush bore, please refer Taper Bush catalogue.
� All these power ratings are calculated at constant torque. � For speeds below 100 rpm and intermediate speeds use normal torque ratings. * Dynamic balancing preferred at these speeds. � TO 20, 22 & 25 sizes are available on request
� All dimensions are in mm unless otherwise specified. � G is the amount by which clamping screws need to be withdrawn to release the tyre. � J is the wrench clearance to allow for tightening and loosening the bush on the shaft.� Shaft ends, although normally located M apart, can project beyond the flanges as shown. In this event allow sufficient space between shaft ends for end float and misalignment. � Maximum torque figures should be regarded as short duration overload ratings for direct on line starting. Angular misalignment capacity up to 4
0.
� Weights & Moment of Inertia specified are at without bores. # For detailed information about Taper Bush bore, please refer T aper Bush catalogue.* Indicates Max bore with shallow key. Std. Max. Bores are 90 mm & 100 mm for Bush No. 3525 and 4030 respectively.
� TO 20, 22 & 25 sizes are available on request.
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FEATURES Tyre-flex Spacer Couplings RST are specifically designed for motor-pump installations, where it is desirable not to disturb drive/driven equipment while servicing impellers, packing glands, etc. The maintenance time-reduction feature is valuable on pumps, compressors and many other applications. It comprises of a spacer assembly and a standard Tyre-flex coupling. The spacer assembly consists of a flanged shaft and a spacer adapter taper bored to suit standard Taper Bush.
SELECTION PROCEDURE 1. Select a suitable size of Tyre-flex coupling using the procedure and data on page
no.2. 2. Refer size column in table A and locate the size of coupling selected. 3. Read across this size until required DBSE can be accommodated.4. The size of the spacer coupling is given in the first column of table A. 5. Refer respective coupling dimensional table to check that the required bores can be accommodated. Notes : � Non-standard spacers are available on request. � Ref. installation instructions for mounting and dismounting.
TABLE A :DIMENSIONAL DATA
TABLE B: DISTANCE BETWEEN SHAFT ENDS (DBSE)
In view of our constant endeavour to improve quality of our products, we reserve the right to alter or change specifications without prior notice.
RST12 RST 16 RST 25 RST 30 RST 35
TYPE
RST
TYRE - FLEX SPACER COUPLINGS
M
DISTANCE BETWEEN SHAFT ENDS
D B S E
TYRE-FLEX
COUPLING
Ø C
Ø D
F
ØB
J
Ø C Ø D T TO F J T TO Ø B T TO
Tyre--
Flex
Size
T/TO
ME S
# Max. Bore
RST 35 140
RST 30 140
Bush Bush
Tyre-flex
Size
T/TO
* T4 ‘B’ flange must be used to fit spacer shaft. # For detailed information about Taper Bush bore, please refer T aper Bush catalogue.